Big Tech faces a historic legal showdown. A major trial over social media addiction has begun and could reshape the technology industry. Meta CEO Mark Zuckerberg testified before a jury for the first time over claims that social media harms young people. His testimony came more than four years after leaked internal documents suggested the company knew its platforms could…

President Donald Trump faced intense questioning at the Supreme Court on Wednesday over his sweeping tariffs, in a case that could reshape the boundaries of presidential authority and U.S. trade policy. Several conservative justices expressed skepticism about the administration’s defense, which claimed the tariffs were necessary to revive American manufacturing and reduce the trade deficit. Small businesses and multiple states…